Fix warning

src/compile.rs

@@ -1,7 +1,4 @@
-use std::{
-    collections::{HashMap, HashSet},
-    num::IntErrorKind,
-};
+use std::collections::{HashMap, HashSet};
 
 use crate::{
     ast::{
@@ -1097,8 +1094,6 @@ fn compile_function_call(
         instructions.push(PreInstr::Instr(Instruction::MoveRetValues(last_reg)));
     }
 
-    let last_param_reg = param_regs.last().unwrap_or(&function_reg);
-
     let mut return_regs = Vec::new();
     if let Some(expected_values) = expected_values {
         for i in 0..expected_values {